1 using System;
2
3 namespace Test
4 {
5 class MainClass
6 {
7 //懒人写法的单例
8 class Weapon
9 {
10 public static readonly Weapon Instance;
11 static Weapon()
12 {
13 Instance=new Weapon();
14 }
15 }
16 class MyWeapon
17 {
18 //static readonly和const的区别
19 public const int Speed=50;//const必须赋值,且只能用这种方法赋值
20 //static readonly 可以赋值也可以不赋值,也可以在用static修饰的构造方法中赋值
21 public static readonly int Speed_1;
22 public static readonly int Speed_2=50;
23 public static readonly int Speed_3;
24 static MyWeapon()
25 {
26 Speed_3=50;
27 }
28 }
29
30 public static void Main (string[] args)
31 {
32 //static readonly和const的联系,
33 //在外边只能通过类名.访问,且在外部不能赋值(二者都是只读的)
34 Console.WriteLine (MyWeapon.Speed_3);//50
35 }
36 }
37 }